Carbon dioxide disulphide

Butyl ether Butyl carbitol /i-Butyl glycidyl ether Butyl mercaptan p-tert-Butyltoluene Carbon disulphide Carbon dioxide Carbon monoxide Carbon tetrachloride Carbonyl sulphide Carbary ... 

Reactivities of carbon disulphide, carbon dioxide and carbonyl sulphide towards some transition metal systems. J. A. Ibers, Chem. Soc. Rev., 1982,11, 57-73 (78),... 

Carbon black Carbon dioxide Carbon disulphide Carbon monoxide Carbon tetrachloride Carbonyl chloride (phosgene)... 

Miscellaneous Reactions.—A full report has appeared of the reactions of carbon dioxide and carbon disulphide with tervalent phosphorus aryl esters and amines the products are ureas and thioureas, respectively.74 The suggested mechanism, previously invoked for similar reactions of carboxylic acids, involves the N-phosphonium salt (97). 

Remove dropping funnel 2 and introduce 17.5 g of commercial iodine through the middle opening of the flask in small portions. Cool the flask with ice. After introducing all the iodine, insert the dropping funnel, remove the cooling, and distil off all the carbon disulphide (in a water bath) in a stream of carbon dioxide. 

Assemble an apparatus as shown in Fig. 102. Lubricate the ground-glass joints with phosphoric acid. Fill the apparatus with dry carbon dioxide using offtake 2. Pour 10 ml of dry carbon disulphide from dropping funnel 3 into flask 1. 

Carbon dioxide, 184, 358, 359 solid see Dry Ice Carbon disulphide, 767 purification of, 175 Carbon monoxide, 185, 1003, 1004 Carbon, decolourising, 127, 128 Carbon tetrachloride, 733, 815 drying of, 734 purification of, 176 Carbonyl chloride, 185 Carborundum chips, 4 Carboxylic acids, equivalent weights of, 1071 ... 

Carbon disulphide burns in air with a blue flame, producing carbon dioxide and sulphur dioxide. Moisture is not necessary for the combustion.7 It inflames at a lower temperature than ether. 

Xanthic acid is obtained as a colourless oil by the action of dilute sulphuric acid on the potassium salt in the cold. It decomposes at 24° C. into ethyl alcohol and carbon disulphide. The ethyl ester, when heated with water, yields carbon dioxide, hydrogen sulphide, ethyl alcohol and ethyl mercaptan, whilst with ammonia, ethyl mereaptan and ccanthogenamide or thiourethaiie, CgH5O.CS.NHa, are produced. These reactions indicate that the constitution of the acid is... 

At 800° C. reaction (2) appears to proceed slowly in either direction, while (1) is very rapid. The fact that the degree of dissociation in (1) is. independent of the amounts of carbon dioxide and carbon disulphide present, shows that carbon monoxide and sulphur are primary products of the decomposition of carbonyl sulphide and are not formed secondarily from the carbon dioxide and carbon disulphide. At temperatures below 400° C. decomposition according to equation (1) is not evident, while at 900° C. it reaches a maximum (64 per cent.) reaction (2) reaches a maximum at about 600° C., at which point 43 per cent, of the carbonyl sulphide is decomposed in this way and 16 per cent, according to reaction (1). The carbon monoxide equilibrium depends upon the pressure, whilst the carbon dioxide equilibrium does not. Nearly all the reactions involved in the thermal decomposition of carbonyl sulphide depend greatly on catalytic influences. Quartz is a pronounced catalyst for reaction (2), but has little influence on reaction (1). Carbonyl sulphide is comparatively rapidly decomposed in quartz vessels, but is stable when kept in glass apparatus. The viscosity of gaseous carbonyl sulphide is as follows x... 

Cyanogen Trisulphide, (CN)2S3 or (CN)6S .—The non-volatile residue which is formed when silver cyanide acts on sulphur chloride constitutes cyanogen trisulphide. It is a dark yellow crystalline powder, insoluble in water, alcohol, ether, carbon disulphide and chloroform. It is unattacked by hydrochloric acid and is soluble in concentrated sulphuric acid. It is transformed into carbon dioxide and sulphuric acid by nitric acid or aqua regia. When distilled, the products are carbon disulphide, sulphur and tricyanuramide, N8(C3N3)3.1... 

Purification may also be effected by oxidation to selenious acid, e.g. by heating with dilute nitric acid. On evaporation the solid selenium dioxide may be obtained, and this can be purified by repeated sublimation in a current of dust-free dry air.3 It may then be redissolved in water, the solution acidified with hydrochloric acid, and the selenium precipitated by passing in sulphur dioxide.4 For further purification the element can be sublimed in a current of carbon dioxide, and after heating for some time at 100° C. to convert it into the crystalline condition, it may be heated with carbon disulphide to extract any traces of residual sulphur. 

The grey form may be obtained from the yellow in carbon disulphide solution by treating with alcohol, or by cooling with carbon dioxide and ether or with liquid air. It is stable towards atmospheric oxygen, and is oxidised by nitric acid more slowly than the brown and metallic modifications. 

Arsenic Pentachloride ( ), AsC15.—By the action of chlorine on arsenic trichloride at a low temperature Baskerville and Bennett 1 obtained a greenish-yellow liquid which they believed to be arsenic pentachloride. Pure solid arsenic trichloride was placed in a vessel surrounded by carbon dioxide snow and saturated with chlorine, the temperature being -88° C. The liquid approximated in composition to AsCIj. It was soluble in carbon disulphide and in ether, and the ether solution, on evaporation at -80° C., left yellow crystals which readily decomposed with slight rise in temperature. The formation of this compound has not been confirmed, however, and its existence is doubtful. 

Arsenic Pentiodide ( ), Asls.—When a mixture of arsenic and iodine in the requisite proportions is heated in an atmosphere of carbon dioxide in a sealed tube at 150° C., a brown crystalline product is obtained.3 The crystals, which melt at 70° C. and have density 3-93, are soluble in water, carbon disulphide, alcohol, ether and chloroform. The solution in carbon disulphide yields, when allowed to crystallise, a mixture of arsenic triiodide and iodine. The latter is readily lost from the pentiodide, and heating at 100° C. in nitrogen in a sealed tube brings about the decomposition. Like the triiodide, the pentiodide dissolves boron tribromide.4... 

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